<template>
    <el-row :gutter="20">
      <el-col :span="6">
        <div class="grid-content bg-purple">
          <el-form :inline="true">
            <el-form-item>
              <el-switch v-model="draggable"active-text="开启拖拽" inactive-text="关闭拖拽"></el-switch>
            </el-form-item>
            <el-form-item>
              <el-button v-if="draggable" size="mini" icon="el-icon-check" plain @click="batchSave">批量保存</el-button>
            </el-form-item>
            <el-form-item>
              <el-button type="danger" size="mini"  icon="el-icon-delete" plain @click="batchDelete">批量删除</el-button>
            </el-form-item>
          </el-form>

          <el-tree
            :data="menus"
            :props="defaultProps"
            :expand-on-click-node="false"
            show-checkbox
            node-key="catId"
            :default-expanded-keys="expandedKey"
            :draggable="draggable"
            :allow-drop="allowDrop"
            @node-drop="handleDrop"
            ref="menuTree">
            <!--v-if="node.id <=2"-->
            <span class="custom-tree-node" slot-scope="{ node, data }">
            <span> {{ node.label }} </span>
            <span>
              <el-button
                type="text"
                size="mini"
                @click="() => append(data)"
              >Append</el-button>
              <el-button type="text" size="mini" @click="edit(data)">edit</el-button>
              <el-button
                v-if="node.childNodes.length==0"
                type="text"
                size="mini"
                @click="() => remove(node, data)"
              >Delete</el-button>
            </span>
            </span>
          </el-tree>

          <el-dialog
            :title="title"
            :visible.sync="dialogVisible"
            width="30%"
            :close-on-click-modal="false">
            <el-form :model="dept">
              <el-form-item label="部门编码">
                <el-input v-model="dept.deptCode" autocomplete="off"></el-input>
              </el-form-item>
              <el-form-item label="部门名称">
                <el-input v-model="dept.deptName" autocomplete="off"></el-input>
              </el-form-item>
              <el-form-item label="排序">
                <el-input v-model="dept.sort" autocomplete="off"></el-input>
              </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
              <el-button @click="dialogVisible = false">取 消</el-button>
              <el-button type="primary" @click="submitData">确 定</el-button>
            </span>
          </el-dialog>
        </div>
      </el-col>

      <el-col :span="18">
        <div class="grid-content bg-purple">
          <el-table
            :data="tableData"
            style="width: 100%">
            <el-table-column
              prop="date"
              label="日期"
              width="180">
            </el-table-column>
            <el-table-column
              prop="name"
              label="姓名"
              width="180">
            </el-table-column>
            <el-table-column
              prop="address"
              label="地址">
            </el-table-column>
          </el-table>
        </div>
      </el-col>
    </el-row>
</template>

<script>
  export default {
    components: {},
    props: {},
    data () {
      return {
        pCid: [],
        draggable: false,
        updateNodes: [],
        maxLevel: 0,
        title: '',
        dialogType: '', //edit,add
        dept: {
          id: '',
          deptCode: '',
          deptName: '',
          parentId: 0,
          sort: 0
        },
        dialogVisible: false,
        menus: [],
        expandedKey: [],
        defaultProps: {
          children: 'children',
          label: 'deptName'
        }
      }
    },

    //计算属性   类似于data概念
    computed: {},

    //监控data中的数据变化
    watch: {},

    //方法集合
    methods: {
      getMenus () {
        this.$http({
          url: this.$http.adornUrl('/user/dept/list/tree'),
          method: 'get'
        }).then(({data}) => {
          console.log('成功获取到菜单数据...', JSON.stringify(data.data))
          this.menus = data.data
        })
      },
      batchDelete () {
        let catIds = []
        let checkedNodes = this.$refs.menuTree.getCheckedNodes()
        console.log('被选中的元素', checkedNodes)
        for (let i = 0; i < checkedNodes.length; i++) {
          catIds.push(checkedNodes[i].catId)
        }
        this.$confirm(`是否批量删除【${catIds}】菜单?`, '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        })
          .then(() => {
            this.$http({
              url: this.$http.adornUrl('/product/category/delete'),
              method: 'post',
              data: this.$http.adornData(catIds, false)
            }).then(({data}) => {
              this.$message({
                message: '菜单批量删除成功',
                type: 'success'
              })
              this.getMenus()
            })
          })
          .catch(() => {
          })
      },
      batchSave () {
        this.$http({
          url: this.$http.adornUrl('/product/category/update/sort'),
          method: 'post',
          data: this.$http.adornData(this.updateNodes, false)
        }).then(({data}) => {
          this.$message({
            message: '菜单顺序等修改成功',
            type: 'success'
          })
          //刷新出新的菜单
          this.getMenus()
          //设置需要默认展开的菜单
          this.expandedKey = this.pCid
          this.updateNodes = []
          this.maxLevel = 0
          // this.pCid = 0;
        })
      },
      handleDrop (draggingNode, dropNode, dropType, ev) {
        console.log('handleDrop: ', draggingNode, dropNode, dropType)
        //1、当前节点最新的父节点id
        let pCid = 0
        let siblings = null
        if (dropType == 'before' || dropType == 'after') {
          pCid =
            dropNode.parent.data.catId == undefined
              ? 0
              : dropNode.parent.data.catId
          siblings = dropNode.parent.childNodes
        } else {
          pCid = dropNode.data.catId
          siblings = dropNode.childNodes
        }
        this.pCid.push(pCid)

        //2、当前拖拽节点的最新顺序，
        for (let i = 0; i < siblings.length; i++) {
          if (siblings[i].data.catId == draggingNode.data.catId) {
            //如果遍历的是当前正在拖拽的节点
            let catLevel = draggingNode.level
            if (siblings[i].level != draggingNode.level) {
              //当前节点的层级发生变化
              catLevel = siblings[i].level
              //修改他子节点的层级
              this.updateChildNodeLevel(siblings[i])
            }
            this.updateNodes.push({
              catId: siblings[i].data.catId,
              sort: i,
              parentCid: pCid,
              catLevel: catLevel
            })
          } else {
            this.updateNodes.push({catId: siblings[i].data.catId, sort: i})
          }
        }

        //3、当前拖拽节点的最新层级
        console.log('updateNodes', this.updateNodes)
      },
      updateChildNodeLevel (node) {
        if (node.childNodes.length > 0) {
          for (let i = 0; i < node.childNodes.length; i++) {
            var cNode = node.childNodes[i].data
            this.updateNodes.push({
              catId: cNode.catId,
              catLevel: node.childNodes[i].level
            })
            this.updateChildNodeLevel(node.childNodes[i])
          }
        }
      },
      allowDrop (draggingNode, dropNode, type) {
        //1、被拖动的当前节点以及所在的父节点总层数不能大于3

        //1）、被拖动的当前节点总层数
        console.log('allowDrop:', draggingNode, dropNode, type)
        //
        this.countNodeLevel(draggingNode)
        //当前正在拖动的节点+父节点所在的深度不大于3即可
        let deep = Math.abs(this.maxLevel - draggingNode.level) + 1
        console.log('深度：', deep)

        //   this.maxLevel
        if (type == 'inner') {
          // console.log(
          //   `this.maxLevel：${this.maxLevel}；draggingNode.data.catLevel：${draggingNode.data.catLevel}；dropNode.level：${dropNode.level}`
          // );
          return deep + dropNode.level <= 3
        } else {
          return deep + dropNode.parent.level <= 3
        }
      },
      countNodeLevel (node) {
        //找到所有子节点，求出最大深度
        if (node.childNodes != null && node.childNodes.length > 0) {
          for (let i = 0; i < node.childNodes.length; i++) {
            if (node.childNodes[i].level > this.maxLevel) {
              this.maxLevel = node.childNodes[i].level
            }
            this.countNodeLevel(node.childNodes[i])
          }
        }
      },
      edit (data) {
        console.log('要修改的数据', JSON.stringify(data))
        this.dialogType = 'edit'
        this.title = '修改分类'
        this.dialogVisible = true

        //发送请求获取当前节点最新的数据
        this.$http({
          url: this.$http.adornUrl(`/user/dept/info/${data.id}`),
          method: 'get'
        }).then(({data}) => {
          //请求成功
          console.log('要回显的数据', JSON.stringify(data))
          this.dept.deptName = data.dept.deptName
          this.dept.deptCode = data.dept.deptCode
          this.dept.id = data.dept.id
          this.dept.parentId = data.dept.parentId
          this.dept.sort = data.dept.sort
        })
      },
      append (data) {
        console.log('append', JSON.stringify(data))
        this.dialogType = 'add'
        this.title = '添加分类'
        this.dialogVisible = true

        this.dept.deptName = ''
        this.dept.deptCode = ''
        this.dept.id = null
        this.dept.parentId = data.id
        this.dept.sort = ''

      },

      submitData () {
        if (this.dialogType == 'add') {
          this.addCategory()
        }
        if (this.dialogType == 'edit') {
          this.editCategory()
        }
      },
      //修改三级分类数据
      editCategory () {
        var {id, deptCode, deptName, parentId, sort} = this.dept
        this.$http({
          url: this.$http.adornUrl('/user/dept/update'),
          method: 'post',
          data: this.$http.adornData({id, deptCode, deptName, parentId, sort}, false)
        }).then(({data}) => {
          this.$message({
            message: '部门修改成功',
            type: 'success'
          })
          //关闭对话框
          this.dialogVisible = false
          //刷新出新的菜单
          this.getMenus()
          //设置需要默认展开的菜单
          this.expandedKey = [this.dept.parentId]
        })
      },
      //添加三级分类
      addCategory () {
        console.log('提交的三级分类数据', this.dept)
        this.$http({
          url: this.$http.adornUrl('/user/dept/save'),
          method: 'post',
          data: this.$http.adornData(this.dept, false)
        }).then(({data}) => {
          this.$message({
            message: '菜单保存成功',
            type: 'success'
          })
          //关闭对话框
          this.dialogVisible = false
          //刷新出新的菜单
          this.getMenus()
          //设置需要默认展开的菜单
          this.expandedKey = [this.dept.parentId]
        })
      },

      remove (node, data) {
        var ids = [data.id]
        this.$confirm(`是否删除【${data.deptName}】菜单?`, '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        })
          .then(() => {
            this.$http({
              url: this.$http.adornUrl('/user/dept/delete'),
              method: 'post',
              data: this.$http.adornData(ids, false)
            }).then(({data}) => {
              this.$message({
                message: '菜单删除成功',
                type: 'success'
              })
              // 刷新出新的菜单
              this.getMenus()
              // 设置需要默认展开的菜单
              this.expandedKey = [node.parent.data.id]
            })
          })
          .catch(() => {
          })

        console.log('remove', node, data)
      }
    },
    //生命周期   -   创建完成（可以访问当前this实例）
    created () {
      this.getMenus()
    },
    //生命周期   -   挂载完成（可以访问DOM元素）
    mounted () {
    },
    beforeCreate () {
    }, //生命周期   -   创建之前
    beforeMount () {
    }, //生命周期   -   挂载之前
    beforeUpdate () {
    }, //生命周期   -   更新之前
    updated () {
    }, //生命周期   -   更新之后
    beforeDestroy () {
    }, //生命周期   -   销毁之前
    destroyed () {
    }, //生命周期   -   销毁完成
    activated () {
    } //如果页面有keep-alive缓存功能，这个函数会触发
  }
</script>
<style scoped>
</style>
